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Quality control material for reagentless measurement of analytes

  • US 7,172,902 B2
  • Filed: 11/26/2003
  • Issued: 02/06/2007
  • Est. Priority Date: 06/12/1996
  • Status: Expired due to Term
First Claim
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1. A method of monitoring calibration of a spectrophotometric apparatus comprising one or more than one calibration algorithm for one or more than one analyte comprising:

  • i) measuring absorbance of a quality control material with said apparatus to obtain a measurement, said quality control material exhibiting an absorbance spectra characterized as having a negative slope for a continuous spectral segment from about 5 nm to about 200 nm in length said spectral segment including a principal calibration wavelength for said one or more than one analyte;

    ii) calculating one or more than one value from said measurement using said one or more than one calibration algorithm; and

    iii) comparing said one or more than one value with an assigned value given to said quality control material for each of said one or more than one analyte, thereby monitoring said one or more than one calibration algorithm of said apparatus.

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